This category needs an editor. We encourage you to help if you are qualified.
Volunteer, or read more about what this involves.
Related categories

88 found
Order:
1 — 50 / 88
  1. added 2018-05-31
    Werner Heisenberg.Gregor Schiemann - 2008 - C.H. Beck.
    Gregor Schiemann führt allgemeinverständlich in das Denken dieses Physikers ein. Thema sind die Erfahrungen und Überlegungen, die Heisenberg zu seinen theoretischen Erkenntnissen geführt haben, die wesentlichen Inhalte dieser Erkenntnisse sowie die Konsequenzen, die er daraus für die Geschichte der Physik und das wissenschaftliche Weltbild gezogen hat. Heisenbergs Vorstellungswelt durchzieht durch ein Spannungsverhältnis, das heute noch das Denken vieler Wissenschaftlerinnen und Wissenschaftler bewegt. Er ist um ein umfassendes Verständnis der Naturprozesse bemüht, zugleich aber von der Berechenbarkeit und Beherrschbarkeit von Phänomenen auch (...)
    Remove from this list   Direct download (2 more)  
    Translate
     
     
    Export citation  
     
    Bookmark  
  2. added 2018-05-03
    Probing Finite Coarse-Grained Virtual Feynman Histories with Sequential Weak Values.Danko D. Georgiev & Eliahu Cohen - 2018 - Physical Review A 97 (5):052102.
    Feynman's sum-over-histories formulation of quantum mechanics has been considered a useful calculational tool in which virtual Feynman histories entering into a coherent quantum superposition cannot be individually measured. Here we show that sequential weak values, inferred by consecutive weak measurements of projectors, allow direct experimental probing of individual virtual Feynman histories, thereby revealing the exact nature of quantum interference of coherently superposed histories. Because the total sum of sequential weak values of multitime projection operators for a complete set of orthogonal (...)
    Remove from this list   Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  3. added 2018-02-18
    Must the Microcausality Condition Be Interpreted Causally?: Beyond Reduction and Matters of Fact.Jordi Cat - 2000 - Theoria 15 (1):59-85.
    The ’microcausality’ condition in quantum field theory is typically presented and justified on the basis of general principles of physical causality. I explore in detail a number of alternative causal interpretations of this condition. I conclude that none is fully satisfactory, independent of further and controversial assumptions about the object and scope of quantum field theories. In particular the stronger causalreadings require a fully reductionist and fundamentalist attitude to quantum field theory. I argue, in a deflationary spirit, for a reading (...)
    Remove from this list   Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  4. added 2018-02-17
    Quantum Mechanics Over Sets: A Pedagogical Model with Non-Commutative Finite Probability Theory as its Quantum Probability Calculus.David Ellerman - 2017 - Synthese (12):4863-4896.
    This paper shows how the classical finite probability theory (with equiprobable outcomes) can be reinterpreted and recast as the quantum probability calculus of a pedagogical or toy model of quantum mechanics over sets (QM/sets). There have been several previous attempts to develop a quantum-like model with the base field of ℂ replaced by ℤ₂. Since there are no inner products on vector spaces over finite fields, the problem is to define the Dirac brackets and the probability calculus. The previous attempts (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  5. added 2018-02-14
    Theory of Everything, Ultimate Reality and the End of Humanity: Extended Sustainability by the Universal Science of Complexity.Andrei P. Kirilyuk - 2017 - Beau Bassin: LAP LAMBERT Academic Publishing.
    Instead of postulated fixed structures and abstract principles of usual positivistic science, the unreduced diversity of living world reality is consistently derived as dynamically emerging results of unreduced interaction process development, starting from its simplest configuration of two coupled homogeneous protofields. The dynamically multivalued, or complex and intrinsically chaotic, nature of these real interaction results extends dramatically the artificially reduced, dynamically single-valued projection of standard theory and solves its stagnating old and accumulating new problems, “mysteries” and “paradoxes” within the unified (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  6. added 2017-12-06
    Addendum to Quantum Wave Function Collapse of a System Having Three Anti Commuting Elements.Elio Conte - unknown
    We indicate a new way in the solution of the problem of the quantum measurement . In past papers we used the well-known formalism of the density matrix using an algebraic approach in a two states quantum spin system S, considering the particular case of three anticommuting elements. We demonstrated that, during the wave collapse, we have a transition from the standard Clifford algebra, structured in its space and metrics, to the new spatial structure of the Clifford dihedral algebra. This (...)
    Remove from this list   Direct download  
    Translate
     
     
    Export citation  
     
    Bookmark  
  7. added 2017-10-11
    A New Argument for the Nomological Interpretation of the Wave Function: The Galilean Group and the Classical Limit of Nonrelativistic Quantum Mechanics.Valia Allori - 2017 - International Studies in the Philosophy of Science (2):177-188.
    In this paper I investigate, within the framework of realistic interpretations of the wave function in nonrelativistic quantum mechanics, the mathematical and physical nature of the wave function. I argue against the view that mathematically the wave function is a two-component scalar field on configuration space. First, I review how this view makes quantum mechanics non- Galilei invariant and yields the wrong classical limit. Moreover, I argue that interpreting the wave function as a ray, in agreement many physicists, Galilei invariance (...)
    Remove from this list   Direct download (9 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  8. added 2017-05-17
    Quanta Transfer in Space is Conserved.Henk Grimm - 2017
    Physical phenomena emerge from the quantum fields everywhere in space. However, not only the phenomena emerge from the quantum fields, the law of the conservation of energy must have its origin from the same spatial structure. This paper describes the relations between the main law of physics and the mathematical structure of the “aggregated” quantum fields.
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  9. added 2016-12-08
    Quantum Cosmology's Implication of Atheism.Q. Smith - 1997 - Analysis 57 (4):295-304.
  10. added 2016-09-01
    Mature Scientific Theory Change: Intertheoretic Context.Rinat M. Nugayev - 2014 - In Vladimir I. Arshinov & Ilya T. Kasavin (eds.), Science and Social Map of the World. Academician V.S.Stepin's Fesrchrift. Alpha. pp. 266-279.
    A brief account of epistemological models that try to unfold the intertheoretic context of theory change is proposed. It is stated that all of them has a host of drawbacks, the most salient one being the lack of adequate description of the research traditions interaction process. The epistemological model of mature theory change, eliminating the drawback, is contemplated and illustrated.
    Remove from this list   Direct download  
    Translate
     
     
    Export citation  
     
    Bookmark  
  11. added 2016-07-15
    Primitive Ontology and the Classical World.Valia Allori - 2016 - In R. Kastner, J. Jeknic-Dugic & G. Jaroszkiewicz (eds.), Quantum Structural Studies: Classical Emergence from the Quantum Level. World Scientific. pp. 175-199.
    In this paper I present the common structure of quantum theories with a primitive ontology, and discuss in what sense the classical world emerges from quantum theories as understood in this framework. In addition, I argue that the primitive ontology approach is better at answering this question than the rival wave function ontology approach or any other approach in which the classical world is nonreductively ‘emergent:’ even if the classical limit within this framework needs to be fully developed, the difficulties (...)
    Remove from this list   Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  12. added 2016-04-26
    An Elegant but “Simple” Form for the Dirac Hydrogen Atom.James D. Edmonds - 1978 - Foundations of Physics 8 (1-2):123-129.
    The operator structures for the constants of the motion of the relativistic hydrogen atom are examined. ThoughJ 3 andJ · J are constants of the motion,J is not. Its replacement, $\tilde {\rm K}$ , is shown to emerge rather naturally in transforming the equation to spherical coordinates. The separation of variables is presented in hypercomplex number form. This leads to some interesting suggestions regarding the matter/antimatter operator for the Dirac equation.
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  13. added 2016-03-16
    Vision of Oneness.Ignazio Licata & Ammar J. Sakaji (eds.) - 2011 - Aracne Editrice.
    A cura di Ignazio Licata, Ammar J. Sakaji Jeffrey A. Barrett, Enrico Celeghini, Leonardo Chiatti, Maurizio Consoli, Davide Fiscaletti, Ervin Goldfain, Annick Lesne, Maria Paola Lombardo, Mohammad Mehrafarin, Ronald Mirman, Ulrich Mohrhoff, Renato Nobili, Farrin Payandeh, Eliano Pessa, L.I Petrova, Erasmo Recami, Giovanni Salesi, Francesco Maria Scarpa, Mohammad Vahid Takook, Giuseppe Vitiello This volume comes out from an informal discussion between friends and colleagues on the answer:what topic do you think as fundamental in theoretical physics nowadays? Obviously wereceived different answers (...)
    Remove from this list   Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  14. added 2016-03-06
    Is the Quantum World Composed of Propensitons?Nicholas Maxwell - 2007 - In Mauricio Suarez (ed.), Probabilities, Causes and Propensities in Physics. Springer. pp. 221-243.
    In this paper I outline my propensiton version of quantum theory (PQT). PQT is a fully micro-realistic version of quantum theory that provides us with a very natural possible solution to the fundamental wave/particle problem, and is free of the severe defects of orthodox quantum theory (OQT) as a result. PQT makes sense of the quantum world. PQT recovers all the empirical success of OQT and is, furthermore, empirically testable (although not as yet tested). I argue that Einstein almost put (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  15. added 2016-01-30
    Conservation of Information and the Foundations of Quantum Mechanics.Giulio Chiribella & Carlo Maria Scandolo - 2015 - EPJ Web of Conferences 95:03003.
    We review a recent approach to the foundations of quantum mechanics inspired by quantum information theory. The approach is based on a general framework, which allows one to address a large class of physical theories which share basic information-theoretic features. We first illustrate two very primitive features, expressed by the axioms of causality and purity-preservation, which are satisfied by both classical and quantum theory. We then discuss the axiom of purification, which expresses a strong version of the Conservation of Information (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  16. added 2015-08-26
    Primitive Ontology in a Nutshell.Valia Allori - 2015 - International Journal of Quantum Foundations 1 (2):107-122.
    The aim of this paper is to summarize a particular approach of doing metaphysics through physics - the primitive ontology approach. The idea is that any fundamental physical theory has a well-defined architecture, to the foundation of which there is the primitive ontology, which represents matter. According to the framework provided by this approach when applied to quantum mechanics, the wave function is not suitable to represent matter. Rather, the wave function has a nomological character, given that its role in (...)
    Remove from this list   Direct download (5 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  17. added 2015-03-10
    Quantum Mechanics and Paradigm Shifts.Valia Allori - 2015 - Topoi 34 (2):313-323.
    It has been argued that the transition from classical to quantum mechanics is an example of a Kuhnian scientific revolution, in which there is a shift from the simple, intuitive, straightforward classical paradigm, to the quantum, convoluted, counterintuitive, amazing new quantum paradigm. In this paper, after having clarified what these quantum paradigms are supposed to be, I analyze whether they constitute a radical departure from the classical paradigm. Contrary to what is commonly maintained, I argue that, in addition to radical (...)
    Remove from this list   Direct download (11 more)  
     
    Export citation  
     
    Bookmark  
  18. added 2015-02-22
    Quantum Theory as an Indication of a New Order in Physics. Part A. The Development of New Orders as Shown Through the History of Physics.D. Bohm - 1971 - Foundations of Physics 1 (4):359-381.
    In this paper, we discuss the general significance of order in physics, as a first step toward the development of new notions of order. We begin with a brief historical discussion of the notions of order underlying ancient Greek views, and then go on to show how these changed in key ways with the rise of classical physics. This leads to a broader view of the significance of order, which helps to indicate what is to be meant by a change (...)
    Remove from this list   Direct download (4 more)  
     
    Export citation  
     
    Bookmark   6 citations  
  19. added 2015-02-19
    Shattering the Mirror of Nature. [REVIEW]Raymond Aaron Younis - 1998 - Metascience 7 (1):216-221.
  20. added 2015-01-19
    Four Tails Problems for Dynamical Collapse Theories.Kelvin J. McQueen - 2015 - Studies in the History and Philosophy of Modern Physics 49:10-18.
    The primary quantum mechanical equation of motion entails that measurements typically do not have determinate outcomes, but result in superpositions of all possible outcomes. Dynamical collapse theories (e.g. GRW) supplement this equation with a stochastic Gaussian collapse function, intended to collapse the superposition of outcomes into one outcome. But the Gaussian collapses are imperfect in a way that leaves the superpositions intact. This is the tails problem. There are several ways of making this problem more precise. But many authors dismiss (...)
    Remove from this list   Direct download (7 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  21. added 2015-01-19
    Quantum Optics and Fundamentals of Physics.D. -G. Welsch - 1995 - Foundations of Physics 25:1117-1117.
    Remove from this list  
     
    Export citation  
     
    Bookmark  
  22. added 2014-12-28
    Mechanics: Non-Classical, Non-Quantum.Elliott Tammaro - 2012 - Foundations of Physics 42 (2):284-290.
    A non-classical, non-quantum theory, or NCQ, is any fully consistent theory that differs fundamentally from both the corresponding classical and quantum theories, while exhibiting certain features common to both. Such theories are of interest for two primary reasons. Firstly, NCQs arise prominently in semi-classical approximation schemes. Their formal study may yield improved approximation techniques in the near-classical regime. More importantly for the purposes of this note, it may be possible for NCQs to reproduce quantum results over experimentally tested regimes while (...)
    Remove from this list   Direct download (6 more)  
     
    Export citation  
     
    Bookmark  
  23. added 2014-12-27
    Prime Number Decomposition, the Hyperbolic Function and Multi-Path Michelson Interferometers.V. Tamma, C. O. Alley, W. P. Schleich & Y. H. Shih - 2012 - Foundations of Physics 42 (1):111-121.
    The phase φ of any wave is determined by the ratio x/λ consisting of the distance x propagated by the wave and its wavelength λ. Hence, the dependence of φ on λ constitutes an analogue system for the mathematical operation of division, that is to obtain the hyperbolic function f(ξ)≡1/ξ. We take advantage of this observation to decompose integers into primes and implement this approach towards factorization of numbers in a multi-path Michelson interferometer. This work is part of a larger (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  24. added 2014-12-23
    Quantum Chaos of an Exciton-Phonon System.W. -H. Steeb, J. A. Louw & A. Kunick - 1987 - Foundations of Physics 17 (2):173-181.
    A simple model of an exciton-phonon system is studied in connection with quantum chaos.
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  25. added 2014-12-22
    Theoretical Model of a Purported Empirical Violation of the Predictions of Quantum Mechanics.Henry P. Stapp - 1994 - Physical Review A 50:18-22.
    A generalization of Weinberg’s nonlinear quantum theory is used to model a reported violation of the predictions of orthodox quantum theory.
    Remove from this list   Direct download  
     
    Export citation  
     
    Bookmark  
  26. added 2014-12-10
    Quark Quantum Numbers and the Problem of Microphysical Observation.K. S. Shrader-Frechette - 1982 - Synthese 50 (1):125 - 145.
    The main question addressed in this essay is whether quarks have been observed in any sense and, if so, what might be meant by this use of the term, observation. In the first (or introductory) section of the paper, I explain that well-known researchers are divided on the answers to these important questions. In the second section, I investigate microphysical observation in general. Here I argue that Wilson's analogy between observation by means of high-energy accelerators and observation by means of (...)
    Remove from this list   Direct download (5 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  27. added 2014-11-23
    Time-Symmetrised Quantum Theory, Counterfactuals and 'Advanced Action'.E. R. - 1999 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 30 (2):237-259.
    Recent authors have raised objections to the counterfactual interpretation of the Aharonov-Bergmann-Lebowitz rule of time-symmetrised quantum theory. I distinguish between two different readings of the ABL rule, counterfactual and non-counterfactual, and confirm that TSQT advocate L. Vaidman is employing the counterfactual reading to which these authors object. Vaidman has responded to the objections by proposing a new kind of time-symmetrised counterfactual, which he has defined in two different ways. It is argued that neither definition succeeds in overcoming the objections, except (...)
    Remove from this list  
     
    Export citation  
     
    Bookmark  
  28. added 2014-11-23
    Remarks on “On Completely Positive Maps in Generalized Quantum Dynamics”.G. A. Raggio & H. Primas - 1982 - Foundations of Physics 12 (4):433-435.
    The assertion by Simmons and Park that the dynamical map associated with the Bloch equations of nuclear magnetic resonance is not completely positive is wrong.
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  29. added 2014-11-20
    Quantum Cosmology, Theistic Philosophical Cosmology and the Existence Question.George Nakhnikian - 2000 - Philo 3 (1):63-72.
    In a recent essay, Quentin Smith revisits a question of philosophical cosmology. Why does the universe exist? This is one way of asking the existence question EQ. Smith notes that all theistic philosophical cosmologists have answered this question in terms of God’s creative choice. Smith favors an “atheistic” philosophical answer: “The universe exists because it has an unconditional probability of existing based on a fundamental law of nature.” He further declares: “This law of nature... is inconsistent with theism and implies (...)
    Remove from this list   Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  30. added 2014-11-20
    Families of Bose Rays in Quantum Optics.N. Mukunda, E. C. G. Sudarshan & R. Simon - 1988 - Foundations of Physics 18 (3):277-306.
    Having known classical wave optics and wave mechanics, can we reverse Schrödinger's path and extend the concept of families of rays of light to provide a new exact rendering of quantum optics including the Bose nature of photons? This question is answered in the affirmative, and the implications of the Bose symmetry for certain nonlocal correlations of the many-ray distribution functions are worked out. The similarities and the differences between classical and quantum wave optics are brought out. The ray-ray Bose (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  31. added 2014-11-19
    On Tracks in a Cloud Chamber.G. F. Dell’Antonio - 2015 - Foundations of Physics 45 (1):11-21.
    It is an experimental fact that \ -decays produce in a cloud chamber at most one track and that this track points in a random direction. This seems to contradict the description of decay in Quantum Mechanics: according to Gamow a spherical wave is produced and moves radially according to Schrödinger’s equation. It is as if the interaction with the supersaturated vapor turned the wave into a particle. The aim of this note is to place this effect in the context (...)
    Remove from this list   Direct download (2 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  32. added 2014-11-08
    Space and Time in the Quantum Universe.Lee Smolin - 1991 - In A. Ashtekar & J. Stachel (eds.), Conceptual Problems of Quantum Gravity. Birkhauser. pp. 228-91.
  33. added 2014-11-08
    Quantum Cosmology and the Beginning of the Universe.Gerrit Smith & Robert Weingard - 1990 - Philosophy of Science 57 (4):663-667.
    In this note a recently developed quantum oscillating finite space cosmological model is described. The principle novelty of the model is that there is a quantum blurring of the classical singularity between cycles, instead of a singularity free bounce. Recently, Quentin Smith (1988) has argued that present theoretical and observational evidence justifies the belief that the past history of the universe is finite. The relevance of this cosmological model to Smith's arguments is discussed.
    Remove from this list   Direct download (6 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  34. added 2014-11-04
    The Structure and Interpretation of Cosmology: Part II. The Concept of Creation in Inflation and Quantum Cosmology.Gordon McCabe - 2005 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 36 (1):67-102.
  35. added 2014-11-03
    On Transformations of Physical Systems.L. S. Mayants - 1976 - Foundations of Physics 6 (5):485-510.
    A universal, unified theory of transformations of physical systems based on the propositions of probabilistic physics is developed. This is applied to the treatment of decay processes and intramolecular rearrangements. Some general features of decay processes are elucidated. A critical analysis of the conventional quantum theories of decay and of Slater's quantum theory of intramolecular rearrangements is given. It is explained why, despite the incorrectness of the decay theories in principle, they can give correct estimations of decay rate constants. The (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  36. added 2014-11-02
    Stochastic Optics: A Reaffirmation of the Wave Nature of Light. [REVIEW]Trevor Marshall & Emilio Santos - 1988 - Foundations of Physics 18 (2):185-223.
    Quantum optics does not give a local explanation of the coincidence counts in spatially separated photodetectors. This is the case for a wide variety of phenomena, including the anticorrelated counting rates in the two channels of a beam splitter, the coincident counting rates of the two “photons” in an atomic cascade, and the “antibunching” observed in resonance fluorescence.We propose a local realist theory that explains all of these data in a consistent manner. The theory uses a completely classical description of (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  37. added 2014-11-01
    What is Consciousness? An Essay on the Relativistic Quantum Holographic Model of the Brain/Mind, Working by Phase Conjugate Adaptive Resonance.P. Marcer & E. Mitchell - 2001 - In P. Loockvane (ed.), The Physical Nature of Consciousness. John Benjamins.
    Remove from this list  
     
    Export citation  
     
    Bookmark  
  38. added 2014-11-01
    On the Argument From Quantum Cosmology Against Theism.Ned Markosian - 1995 - Analysis 55 (4):247 - 251.
    In a recent Analysis article, Quentin Smith argues that classical theism is inconsistent with certain consequences of Stephen Hawking's quantum cosmology.1 Although I am not a theist, it seems to me that Smith's argument fails to establish its conclusion. The purpose of this paper is to show what is wrong with Smith's argument. According to Smith, Hawking's cosmological theory includes what Smith calls "Hawking's wave function law." Hawking's wave function law (hereafter, "HL") apparently has, among its consequences, the following claim. (...)
    Remove from this list   Direct download (6 more)  
     
    Export citation  
     
    Bookmark  
  39. added 2014-10-31
    Who's Afraid of Not Completely Positive Maps?Anal Shaji & E. C. G. Sudarshan - 2005 - Physics Letters A 341:48--54.
    The arguments that are often put forward to justify the singular importance given to completely positive maps over more generic maps in describing open quantum evolution are studied. We find that these do not appear convincing on closer examination. Positive as well as not positive maps are good candidates for describing open quantum evolution.
    Remove from this list   Direct download  
     
    Export citation  
     
    Bookmark  
  40. added 2014-08-18
    Problem osobliwości początkowej jako geneza poszukiwania kwantowych teorii powstania Wszechświata.Marek Jakubiec - 2013 - Semina Scientiarum 12:34-48.
    This paper puts forward the problem of singularity – one of the most important issues in contemporary cosmology. Firstly, the history of “singularity” concept and basis of Penrose’s and Hawking’s theorem of singularity are discussed. Secondly, the problem of singularity is presented as a genesis of search of quantum theories of the beginning of the Universe, in which the concept of singularity is not present. One sophisticated concept of Hartle and Hawking is presented, in particular the authors’ methodology is described. (...)
    Remove from this list   Direct download (2 more)  
    Translate
     
     
    Export citation  
     
    Bookmark  
  41. added 2014-08-18
    Quantising on a Category.C. J. Isham - 2005 - Foundations of Physics 35 (2):271-297.
    We review the problem of finding a general framework within which one can construct quantum theories of non-standard models for space, or space-time. The starting point is the observation that entities of this type can typically be regarded as objects in a category whose arrows are structure-preserving maps. This motivates investigating the general problem of quantising a system whose ‘configuration space’ (or history-theory analogue) is the set of objects Ob(Q) in a category Q. We develop a scheme based on constructing (...)
    Remove from this list   Direct download (5 more)  
     
    Export citation  
     
    Bookmark  
  42. added 2014-08-07
    Dalszy Ciąg Ważnej Debaty [Recenzja] Quantum Cosmology and the Laws of Nature - Scientific Perspectives on Divine Action, Red.: R.J. Russel, N. Murphy, C. J. Isham, 1993. [REVIEW]Michał Heller - 1994 - Zagadnienia Filozoficzne W Nauce 16.
  43. added 2014-08-07
    “Simultaneous Measurement” From the Standpoint of Quantum Estimation Theory.Carl W. Helstrom - 1974 - Foundations of Physics 4 (4):453-463.
    The purpose of the simultaneous measurement of noncommuting quantum observables can be viewed as the joint estimation of parameters of the density operator of the quantum system. Joint estimation involves the application of a multiply parameterized operator-valued measure. An example related to the simultaneous estimation of the position and velocity of a particle is given. Conceptual difficulties attending simultaneous measurement of noncommuting observables are avoided by this formation.
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  44. added 2014-06-23
    Quantum Brain Dynamics and Consciousness: An Introduction.Marj Jibu & Kunio Yasue - 1995 - John Benjamins.
    The book is the first to give a systematic account, founded in fundamental quantum physical principles, of how the brain functions as a unified system.
    Remove from this list   Direct download (5 more)  
     
    Export citation  
     
    Bookmark  
  45. added 2014-06-15
    On the Debate Concerning the Proper Characterization of Quantum Dynamical Evolution.Michael E. Cuffaro & Wayne C. Myrvold - 2013 - Philosophy of Science 80 (5):1125-1136.
    There has been a long-standing and sometimes passionate debate between physicists over whether a dynamical framework for quantum systems should incorporate not completely positive (NCP) maps in addition to completely positive (CP) maps. Despite the reasonableness of the arguments for complete positivity, we argue that NCP maps should be allowed, with a qualification: these should be understood, not as reflecting ‘not completely positive’ evolution, but as linear extensions, to a system’s entire state space, of CP maps that are only partially (...)
    Remove from this list   Direct download (11 more)  
     
    Export citation  
     
    Bookmark  
  46. added 2014-06-10
    Sub-Quantum Entities.John J. Fleming - 1964 - Philosophy of Science 31 (3):271-274.
    The possibility of a sub-quantum mechanical realm has been investigated in recent years by DeBroglie, Bohm, Vigier, and others. It is felt that what is needed in this investigation is some simple and direct resolution of the problem as to whether sub-quantum entities exist or not. By restricting attention to quanta of light energy there is presented a theoretical expression for a sub-quantum or micro-photon which has proven to be testable. It is possible by this development to bridge the particle-wave (...)
    Remove from this list   Direct download (7 more)  
     
    Export citation  
     
    Bookmark  
  47. added 2014-05-25
    Relativistic Dynamical Theory of Particle Decay and Application to K-Mesons.John R. Fanchi - 2003 - Foundations of Physics 33 (8):1189-1205.
    The theoretical description of particle decay by a single particle theory requires the use of a probability density in time that is not present in conventional theories. The problem of single particle decay is consistently described here within the context of a single particle, relativistic dynamical theory. We derive experimentally testable differences between the standard model and Relativistic Dynamics for a two-state system: the neutral K-meson (K 0) system. We show that the estimate of mass difference between the two states (...)
    Remove from this list   Direct download (4 more)  
     
    Export citation  
     
    Bookmark  
  48. added 2014-05-25
    Quantum Optical Predictions inQ Representation for Bell's Type Experiments.Miguel Ferrero & T. W. Marshall - 1991 - Foundations of Physics 21 (11):1315-1321.
    Using the Q representation, we study the disagreement between quantum optical formalism and local realism and we show that the phenomenon of enhancement, first revealed by the local realist analysis, could receive a simple explanation if we use this particular version of the quantum formalism. Nevertheless, some fundamental difficulties remain.
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  49. added 2014-05-25
    The Compatibility Between Quantum Mechanics and Local Realist Theories in Atomic Cascade Experiments.M. Ferrero & T. W. Marshall - 1991 - Foundations of Physics 21 (4):403-415.
    We show that the divergence between the predictions of quantum optics and the local realist theory known as stochastic optics, for the extended type of photon-coincidence experiment described recently by de Caro, is of the same order of magnitude as for Aspect-type experiments. This means that, in such new experiments, as in those so far performed, counting statistics will have to be greatly improved before a discrimination between the two theories becomes possible.We also show that the outstanding difference between the (...)
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  50. added 2014-05-13
    Stochastic Phase Spaces, Fuzzy Sets, and Statistical Metric Spaces.W. Guz - 1984 - Foundations of Physics 14 (9):821-848.
    This paper is devoted to the study of the notion of the phase-space representation of quantum theory in both the nonrelativisitic and the relativisitic cases. Then, as a derived concept, the stochastic phase space is introduced and its connections with fuzzy set theory and probabilistic topological (in particular, metric) spaces are discussed.
    Remove from this list   Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
1 — 50 / 88